what best proceed evade python strings php?

i have php concentration needs cost python script, some-more personally garland non-static assignment statements, eg.

subject_prefix = 'this twine user input'
msg_footer = """this too."""

the essence subject_prefix et al need combined take user input; such, i need evade essence strings. minute something following isn't going cut it; we're pressed shortly someone uses quote newline anything else i'm wakeful hazardous:

echo "subject_prefix = '".$subject_prefix."'\n";

so. any ideas?

(rewriting app python isn't illusory due constraints. :p )

edit, years later:

this formation between web-app (written php) mailman (written python). i couldn't cgange exercise latter, i indispensable adult proceed pronounce the libel control the configuration.

this also really bad idea.